Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Other revenues (excluded from ASC 606)	$ 57.3	$ 124.6	$ 359.8	$ 475.7
Revenue	10,429.5	8,543.0	29,761.7	24,823.4
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	1,358.9	1,066.7	3,720.0	3,313.1
EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	2,641.9	1,953.2	7,059.8	5,496.1
LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	760.8	639.1	2,352.1	1,889.1
North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	5,610.7	4,759.4	16,270.1	13,649.5
Aviation segment
Disaggregation of Revenue [Line Items]
Revenue	5,025.3	3,705.8	14,218.9	10,531.6
Aviation segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	379.8	257.1	1,135.5	764.1
Aviation segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	1,122.1	752.0	2,754.9	1,821.8
Aviation segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	468.0	331.9	1,435.5	964.4
Aviation segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	3,098.7	2,420.7	9,019.3	6,972.2
Land segment
Disaggregation of Revenue [Line Items]
Revenue	2,854.4	2,770.5	8,675.3	8,117.9
Land segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	0.7	0.8	2.6	1.5
Land segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	605.1	548.6	1,920.6	1,680.9
Land segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	136.1	179.3	476.7	508.3
Land segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	2,078.4	2,031.4	6,179.3	5,893.2
Marine segment
Disaggregation of Revenue [Line Items]
Revenue	2,549.8	2,066.7	6,867.5	6,173.9
Marine segment | Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	978.3	808.8	2,581.9	2,547.5
Marine segment | EMEA
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	914.7	652.6	2,384.3	1,993.3
Marine segment | LATAM
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	156.6	127.9	439.9	416.4
Marine segment | North America
Disaggregation of Revenue [Line Items]
Revenue, ASC 606	$ 433.6	$ 307.3	$ 1,071.5	$ 784.1